Method of making recoil preventing nozzles



June 10, 1947. c K. HUTHSING 2,421,887

METHOD OF MAKING RECOIL PREVENTING NOZZLES Filed Jan. 2, 1945 INVENTOR ATTORNEYS:

the hole.

Patented June 10, 1947 METHOD OF MAKING RECOIL PREVENTING NOZZLES Charles K. Huthsing, Grosse Pointe Farms, Mich.

Application January 2, 1943, Serial No. 471,155

3 Claims.

This invention relates to a recoil preventing, high pressure, discharge nozzle, particularly useful for carbon dioxide fire extinguishers.

The main objects of this invention are to provide a recoil preventing, discharge nozzle of simple and economical construction, and to provide a device of this character which is made of a single piece and which thereby precludes the possibility of not being fully assembled at all times.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which;

Figure 1 is an enlarged, fragmentary view, partly in section and partly in elevation, of a high pressure gas container equipped with a discharge valve and the recoil preventing, high pressure, discharge nozzle of the present invention;

Fig. 2 is an enlarged fragmentary sectional view showing the recoil preventing discharge nozzle during the process of construction and before the end of the nozzle has been closed;

Fig. 3 is a view similar to Fig. 2, showing the construction after the end of the nozzle or nipple has been deformed to close the opening therein and which deforming has been done by a spinning operation.

Heretofore, in the construction of, recoil preventing discharge nozzles of this character, there have been two general methods employed in their manufacture.

In one method it has been customary to interiorly thread the opening of the discharge nozzle and screw therein a cup-shaped plug, the axial end of which is closed by reason of not boring the hole entirely through and the side wall of which ha been drilled to provide radially disposed, diametrically opposed openings for discharging the gas therethrough.

The other method has been to drill the opening of the discharge nipple through the valve body and thereby making a blind end hole in the nozzle to which communication is had by radial drilling of diametrically opposed holes. I

The latter method presents manufacturing difiiculties, as does the drilling of all blind end holes where the bottom of the hole has to be positioned or spaced accurately for determining the thickness of the material beyond the axial end of Furthermore, the drilling of the hole through the entire valve body interferes, in some instances, with the formation of the valve seat and other mechanism within the valve body, and also necessitatcs'the tapping'of the hole at the far side of the valve body and closing it with a threaded plug, or the like,

In the first mentioned method of manufacture,

the recoil preventing function is secured by the connecting of two pieces or parts, i. e., the body nozzle portion, the opening therethrough of which is interiorly threaded, and then a separate cupshaped plug exteriorly threaded to be screwed therein. With this construction, there is always the liability of the threaded plug being removed and inadvertently not replaced. Inasmuch as the discharge nozzle is normally surrounded and concealed by a conductor coupling threaded thereover, the absence of the cup-shaped plug cannot be determined readily by visual inspection unless the conductor coupling is unscrewed from the assembly.

In the present construction, the beneficial effect of a recoil preventing high pressure discharge nozzle is secured by a one piece construction, and yet the drilling of the passageway through the nozzle is done from the outer end of the nozzle and does not pass entirely through the valve body, thereby eliminating the necessity of any threaded plugs to close the openings and without interfering with the construction of the valve seat within the valve body.

In the construction shown in the drawings, a high pressure fluid container 4 is shown, provided with a valve body 6 threaded therein for retaining the fluid within the container under high pressure. The usual threaded valve stem 8 within the valve body 6 is provided with an operating or control handle I0 and a handle I2 is pivotally secured to the valve body for handling the container and transporting it when in use.

The valve body 6, opposite the handle I2, is provided with an horizontally extending nozzle I4, exteriorly threaded as shown at l6 and provided with an axial bore l8 which is drilled therein from the outer end, or from the left, as viewed in Fig. 2 of the drawings.

The terminating end of the nozzle I 4 is of reduced diameter, as shown at 20, so as to leave an annular space therearound when a cylindrical conductor coupling 22 is threaded thereon in the usual manner. The terminating end 20 is provided with radially disposed, diametrically opposed openings 24, positioned closely adjacent to the juncture of the reduced portion 20 and the main nozzle portion l 4. The method of construction up to this point has consisted in exteriorly threading the nozzle I4, drilling of the bore l8, and drilling of the openings 24. The particular order or sequence of these three operations is of no particular consequence, as they may be done in any desired sequence without affecting the invention disclosed herein.

After the nozzle has progressed in its construction to the condition shown in Fig. 2, the outer terminating end of the reduced portion 20 is then deformed, preferably by a spinning operation, to close the opening therethrough and. form a. terminating end as shown at 26, in Fig. 3 of the drawings. The end of the nipple being closed by deforming the metal, as shown at 26, causes the discharge of gas or fluid through the bore 18 to pass out through the radially disposed, diametrically opposed opening 24. Due to the diametrically opposed position of the openings 24, the recoil of gas is loalanced in all directions, and the recoil of the container 4, which is held in the hand of the operator, is negligible.

It will be further understood, of course, that the openings 24 may be drilled last, i. e., after the terminating end of the nozzle has been closed, as shown at 26. It is of no particular consequence whether the holes 24 are drilled before the terminating end is spun closed, or after, this being merely a matter of preference in shop practice.

I. claim:

1. In the method of making a recoil preventing, high pressure, discharge nozzle for fluids, the steps of providing a valve body with an integral projecting nipple, axially boring said nipple inwardly from its outer end to form a longitudinal passageway through said nipple, drilling radially disposed, diametrically opposed, openings through the wall of said nipple in communication with the passageway therein, and deforming the outer end of said nipple to completely close the outer end of said passageway.

2. In the method of making a recoil preventing, high pressure, discharge nozzle for fluids, the steps of providing a valve loody with an integral projecting cylindrical nipple, reducing the diameter of a portion of said nipple at the outer end thereof and threading the exterior of said nipple inwardly of said reduced portion, axially looring said nipple inwardly from its outer end to form a longitudinal passageway through said nipple, drilling radially disposed, diametrically opposed, openings through the wall of said reduced portion of said nipple in communication with the passageway therein, and deforming said reduced portion at the outer end of said nipple to completely close the outer end of said passageway.

3. In the method of making a recoil preventing, high pressure, discharge nozzle for fluids, the steps of providing a metallic valve body having 9, valve seat opening and an integral projecting nipple, axially boring said metallic nipple inwardly from its outer end to form a longitudinal passageway therein terminating short of intersection with said valve seat opening, drilling radially disposed, diametrically opposed, openings through the wall of said nipple in communication with the passageway therein, and deforming the metal at said outer end of said nipple to completely close said outer end of said passageway.

CHARLES K. HUTHSING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,166,300 Komar July 18, 1939 994,473 Lukens June 6, 1911 2,258,869 Towart, Jr. Oct. 14, 1941 1,106,679 Randall Aug. 11, 1914 1,849,603 Weatherhead Mar. 15, 1932 2,166,300 Komar July 18, 1939 2,151,271 Hassig Mar. 21, 1939 2,238,693 Geertz Apr. 15, 1941 1,890,517 Laegel Dec. 13, 1932 2,109,966 Breitmann Mar. 1, 1938 FOREIGN PATENTS Number Country Date 380,556 Great Britain Sept. 22, 1932 354,114 Great Britain Aug. 6, 1931 

